the nickel plated will work just as good as non plated
nickel is harder and will crack and peal as stated before
the problem I ran into is some Speer brass ( 380 only )
has two (2) wall thicknesses
the lower part is thicker than the upper (upper is where the bullet
is seated )
I had to get a differant expander from RCBS (it was free )
to load those cases
( the original expander crushed or mangaled most of them )
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